feat(registry): register dca and copytrade

[kahwaipd]

The v3 cutover emptied templates.json deliberately: every listed repo is cloned and validated by CI, so a repo may only be listed once it actually ships a validatable bundle — and on the day the schema changed, none did.

Both conversion PRs have since landed. butler-skill-dca is dca@2 (timer) and butler-skill-copytrade is copytrade@5 (trade), each a recipe.json + duty.py + README.md at its repo root, and each clean of the nine money verbs deleted on 2026-09-21 — both run acp trade through subprocess with a literal --idempotency-key.

Why it matters now

Until this lands the published index is "templates": [], so every recipe_search in the fleet answers outcome: "none" and Butler writes each duty as code from scratch. The registry exists and serves nothing.

What gets published

2 template(s) indexed, 3 alias(es)

The three aliases are dca@1, copytrade@3 and copytrade@4 → their current versions, which is what lets a duty whose stored env.RECIPE names an older ref keep its settings door.

Both refs are main, so the hourly publish re-resolves each to a commit and republishes whenever either template repo merges — a template update is not a PR here.

app-checkout and web-checkout stay unlisted: a checkout flow has no duty.py to validate yet.

Rebased

This branch originally also carried a fix for the re.compile / FORBIDDEN_CALLS bug. The same bug was fixed on main by #32, and the second copy is exactly what made this branch conflict — so the branch is now rebased onto main and reduced to its unique change, templates.json. Its two tests are dropped as well: the merged fix carries equivalent coverage in both directions.

Verified against the real repos

Not fixtures — --all clones both template repos at main:

check_registry      OK  copytrade = …/butler-skill-copytrade @ main
                    OK  dca       = …/butler-skill-dca @ main
validate --all      copytrade  OK
                    dca        OK
build_index --dry-run   2 template(s) indexed, 3 alias(es)
pytest              114 passed

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